CRAT TEST FINAL EXAM AND PRACTICE EXAM
QUESTIONS 2025/2026 COMPLETE 500 EXAM
QUESTIONS WITH DETAILED VERIFIED
ANSWERS (100% CORRECT ANSWERS)
/ALREADY GRADED A+ ||BRAND NEW!!
Question:1
What is the underlying issue to all Environmental Problems?
A. Human population growth
B. The growth of the Automobile industry
C. Increased use of GMOs
D. Coal burning power plants ..ANSWER...A. Human Population Growth
Question:2
What is Carrying Capacity (In reference to Earth)?
A. How much weight the Earth can hold
B. How many people needed to hold the Earth
C. The max number of individuals Earth can support
D. All of the above ..ANSWER...C. The max number of individuals Earth can
support.
1|P a g e
,Question:3
What is Earths estimated carrying capacity?
A. 7 billion
B. 12 billion
C. 15 billion
D. Depends on who you ask ..ANSWER...D. It depends on who you ask.
Question:4
What is the Gaia hypothesis?
A. The Earth supports everything
B. The Earth does not support everything
C. Everything is here to support Earth
D. All of the above ..ANSWER...everything is here to support Earth.
Question:5
What is an observation agreed upon by most scientists?
Fact
Theory
Hypothesis
Experiment ..ANSWER...A Theory
Question:6
What is a scientific statement that can be proven or disprove?
Fact
2|P a g e
,Hypothesis
Experiment
Theory ..ANSWER...Hypothesis
Question:7
What is an experiment that can be compared to a standard? ..ANSWER...A
controlled experiment
Question:8
What is the scientific method? ..ANSWER...Observing nature and applying
observations
Question:9
Define Doubling time ..ANSWER...The time it takes a population to double
Question:10
Change that tends to stabilize a system is____________ ..ANSWER...Negative
feedback
Question:11
Change that tends to destabilize a system is_________ ..ANSWER...Positive
feedback
Question:12
What is environmental unity? ..ANSWER...Everything in an environment affects
everything else.
3|P a g e
, Question:13
What type of growth does this picture represent? ..ANSWER...Exponential
Growth
Question:14
Biosphere is where what occurs? ..ANSWER...Life
Question:15
True or False: An open system allows things to come in and out ..ANSWER...True
Question:16
True or False: uniformitarianism means present principles were also the same in
the past ..ANSWER...True
Question:17
What is the doubling time of a population with the growth rate of 7%?
..ANSWER...10 years
Question:18
a bacteria in a jar with a population of 1 doubles every two minutes starting at
9:00. The jar was full at 10:00. What time was it half full? ..ANSWER...9:58
Question:19
Lead primarily causes what? ..ANSWER...Nerve damage
4|P a g e
QUESTIONS 2025/2026 COMPLETE 500 EXAM
QUESTIONS WITH DETAILED VERIFIED
ANSWERS (100% CORRECT ANSWERS)
/ALREADY GRADED A+ ||BRAND NEW!!
Question:1
What is the underlying issue to all Environmental Problems?
A. Human population growth
B. The growth of the Automobile industry
C. Increased use of GMOs
D. Coal burning power plants ..ANSWER...A. Human Population Growth
Question:2
What is Carrying Capacity (In reference to Earth)?
A. How much weight the Earth can hold
B. How many people needed to hold the Earth
C. The max number of individuals Earth can support
D. All of the above ..ANSWER...C. The max number of individuals Earth can
support.
1|P a g e
,Question:3
What is Earths estimated carrying capacity?
A. 7 billion
B. 12 billion
C. 15 billion
D. Depends on who you ask ..ANSWER...D. It depends on who you ask.
Question:4
What is the Gaia hypothesis?
A. The Earth supports everything
B. The Earth does not support everything
C. Everything is here to support Earth
D. All of the above ..ANSWER...everything is here to support Earth.
Question:5
What is an observation agreed upon by most scientists?
Fact
Theory
Hypothesis
Experiment ..ANSWER...A Theory
Question:6
What is a scientific statement that can be proven or disprove?
Fact
2|P a g e
,Hypothesis
Experiment
Theory ..ANSWER...Hypothesis
Question:7
What is an experiment that can be compared to a standard? ..ANSWER...A
controlled experiment
Question:8
What is the scientific method? ..ANSWER...Observing nature and applying
observations
Question:9
Define Doubling time ..ANSWER...The time it takes a population to double
Question:10
Change that tends to stabilize a system is____________ ..ANSWER...Negative
feedback
Question:11
Change that tends to destabilize a system is_________ ..ANSWER...Positive
feedback
Question:12
What is environmental unity? ..ANSWER...Everything in an environment affects
everything else.
3|P a g e
, Question:13
What type of growth does this picture represent? ..ANSWER...Exponential
Growth
Question:14
Biosphere is where what occurs? ..ANSWER...Life
Question:15
True or False: An open system allows things to come in and out ..ANSWER...True
Question:16
True or False: uniformitarianism means present principles were also the same in
the past ..ANSWER...True
Question:17
What is the doubling time of a population with the growth rate of 7%?
..ANSWER...10 years
Question:18
a bacteria in a jar with a population of 1 doubles every two minutes starting at
9:00. The jar was full at 10:00. What time was it half full? ..ANSWER...9:58
Question:19
Lead primarily causes what? ..ANSWER...Nerve damage
4|P a g e
